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为了研究结构拉张破裂的破坏规律,揭示材料破裂的机理。本文应用有限元材料破裂过程分析系统对混凝土桥墩在偏心加载条件下的受力、变形与内部裂缝萌生、扩展及破裂的全过程进行数值模拟。模拟结果显示,桥墩结构受拉应力作用发生破裂而形成不连续面,并且拉应力作用下不断形成破裂面,结构形式相应发生演化,并导致应力状态改变。随着载荷在不同位置的加载,最终确定裂缝的分布位置。数值模拟与文献试验结果较接近,对于深入了解T型桥结构的联合受力规律具有一定的参考价值.
In order to study the rupture of structural tensile failure, reveal the mechanism of material rupture. In this paper, finite element method of fracture process analysis system is used to simulate the whole process of stress, deformation and internal crack initiation, propagation and fracture of concrete piers under eccentric load. The simulation results show that the pier structure is ruptured by tensile stress and forms a discontinuity. Under the action of tensile stress, the rupture surface is continuously formed, and the structural form evolves correspondingly and the stress state changes. As the load is loaded at different locations, the location of the fracture is finally determined. The results of numerical simulation are close to those of literature test, which is of certain reference value for understanding the joint stress law of T-shaped bridge structure.